How can I find out what's taking up space on my hard drive?

George went to back up his iPhone and he got a message that he's run out of room on his laptop. What can he do? Leo recommends installing WinDerStat. It's color-coded and can show you at a glance what is taking up all that room on your laptop. Then move stuff off of it into an external hard drive. Leo also recommends buying extra space on iCloud. For $2.99 a month you can backup 50GB of space. Great deal. Backing up to it is also the easiest thing to do.